My first hatch is currently under 'lock down'. This is day 21, though we started the eggs at 10:30 pm on day 1, so its sort of still day 20. Last night the temp reached -30C (-22F) outside, and it was all we could do to keep our old farm house warm. The bator dropped to 96F. I'm still trying to get it back up, its at 98, but it isn't climbing very well. Would my chicks be dead now?